Thirteen people have appeared in court charged in connection with rioting in Dublin city centre.
The trouble broke out after republican protestors tried to stop a loyalist march and rally through the Republic of Ireland's capital on Saturday.
Irish police and youths fought pitched battles along O'Connell Street and 41 people were arrested.
More people are expected before emergency court sittings in Dublin on Monday in connection with the violence.
Disturbances broke out in O'Connell Street, where a Love Ulster rally to remember the victims of republican violence was to start.
Stones and fireworks were thrown after republican demonstrators mounted a counter-march.
Rioting continued for several hours and cars were burned and shops looted as the trouble moved towards Government Buildings, where some of the Love Ulster marchers held a rally.
The offices of the Progressive Democrats political party were also attacked.
Violence condemned
The party's Michael McDowell, justice minister in the Republic's coalition government, met a Love Ulster delegation including DUP MP Jeffrey Donaldson, before they left in buses for home.
Irish police manned overbridges along the M1 towards the border, but trouble flared in Dundalk where missiles were thrown at Love Ulster coaches.
Thirteen of the 41 people arrested were charged with public order offences before a special sitting of Dublin District Court on Saturday night.
Four people, including two men and two women, were charged with smashing the windows of a store on O'Connell Street and looting the contents. Several others were charged with public order offences, including throwing bricks and glass bottles at police.
There has been widespread condemnation of the violence with Irish Prime Minister Bertie Ahern saying there was "absolutely no excuse for the disgraceful scenes".
Northern Ireland Secretary Peter Hain said he was "not clear" if the disturbances in Portadown on Sunday were linked to the earlier violence in Dublin.
Mr Hain said people had the right to protest peacefully, but it was very important they also worked together rather than "provoke each other".
He said people should cooperate "in this critical period when we're going up to political negotiations on the future of Northern Ireland".
(BBC)
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